/* Qilin - a Java Pointer Analysis Framework
 * Copyright (C) 2021-2030 Qilin developers
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3.0 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * <https://www.gnu.org/licenses/lgpl-3.0.en.html>.
 */

package qilin.core.pag;

import qilin.core.context.ContextElement;
import sootup.core.jimple.common.stmt.InvokableStmt;

/** callsite based context element in the points to analysis. */
public class CallSite implements ContextElement {

  private final InvokableStmt unit;

  public CallSite(InvokableStmt unit) {
    this.unit = unit;
  }

  public InvokableStmt getUnit() {
    return unit;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((unit == null) ? 0 : unit.hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) return true;
    if (obj == null) return false;
    if (getClass() != obj.getClass()) return false;
    CallSite other = (CallSite) obj;
    if (unit == null) {
      return other.unit == null;
    } else if (other.unit == null) {
      return false;
    } else {
      return unit.equals(other.unit);
    }
  }

  public String toString() {
    return "CallSite: " + unit;
  }
}
